Corkscrew



FIG. 1 is a right side view of a corkscrew showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is an underneath plan view thereof.

The ornamental design for a corkscrew, as shown and described.